Driving mechanism for machines for drilling, tapping, &amp;c.



J. M; HOUSEL.

DRIVING MECHANlSM FOR MACHINES FOR DRILLING, TAPPING, 6L0.

APPLICATION FILED JULY 28. 1914.

1,160,607. Patented Nov. 16, 1915.

2 SHEETS-SHEET 1.

WITN E5555. INVENTUR WW 5 We! xdmfl ilv. mw w COLUMBIA PLANDOIAPH c0, WASHINGTON. u. c.

ATTEIR'NEYEL J. MQHOUSEL.

DRIVING MECHANISM FOR MACHINES FOR DRILLING, TAPPING &c.

APPLICATION FILED JULY28.1914.

1,160,607. Patented Nov. 16, 1915.

2 SHEETS-$HEET'2- H .5... a i

INVE NTDR TNEEE:

TTURNEYB.

COLUMBIA PLANOGHAPH C0.,WASHINGTON, D. c.

UNITE srntrns rATENrorrIcn.

JOSEPH M. .HoUsEnor BRADFoRD, PENNSYLVANIA, ASSIGNOR or oNnnALsTo EDMUND R. CALDWELL, or BRADFORD, PENNSYLVANIA. r

. DR VI G MECHANISM on MACHINES FOR DRILLING, TAPPING, 860.

To all whom may concern I Be it known that I, JOSEPH M. HoUsEL, a citizen of the United States, residlng at Bradford, inthe county of McKean and State of Pennsylvania, have invented new and useful Improvements in Driving Mechanism for Machines for Drilling, Tapping, &c., of which the following is a specification.

This invention relates to a press or ma chine for drilling, tapping, finishing and similar work andhas for its object to pro- I vide a machine of this character which is comparatively slmple in construction, which can be readily operated for. either turning the tool forwardly or backwardly, which is operated frictionally so that when the, tool meets with unusual resistance the driving connection between the same andthe source of power will slip'and thereby avoidbreakcal transverse section taken inv line44-.,

. Fig. 2.,

corresponding parts throughout the several views. l f I I Although the main frame of this machlne may be of any suitable construction that shown in the drawings comprises a base 1 and a hollow column 2-r1s1ng from the base.

, The work to be drilled, tapped orfinished-is supported upon a table'3 mountedon the :front side of the column and the tool 4 which operates upon the work piece is mounted upon the lower end of an upright operating or tool shaft 5 which is capable of rotation upon its axis' and also movable verticallyin order to adopt the tool to the work. As'shown in the drawings, the lower part of the tool shaft is journaled in a vertically. movable shifting sleeve'6, so as to be capable of turning therein but compelled to move vertically therewith, R this shifting 1 sleeve being guided in an arm '7 projecting a forwardly from the column above thetable.

Specification of Letters Patent. Application filed 311151 28, 1914. Serial No. 853,595.

description will therefore relate to these im- Similar characters of reference indicate Patented Nov. 16, 1915.

The "ertical motion of the shifting sleeve may be efiected in any suitable manner, for

instance, by means of a horizontal adjusting I shaft 8 journaled in the arm 7 and provided with a handle 9 forturning the same and also with a pinion 10 which engages with a gear rack '11 on: the adjusting sleeve, as shown in Figs. 1 and 2. The shifting sleeve and the parts mounted thereon may be) counterbalanced by a weight 12 arranged in the hollow column and connected-with the shifting sleeve by means of a line, cord or similar flexible member 13 which passes around guide rollers 14 on the upper part of the column. 4

My improvements relate more particularly to a frictional driving mechanism whereby the tool shaft may be turned either forwardly or backwardly and the following provements: 15, 16 represent upper and lower driven friction wheels which are arranged one above the other, these wheels being beveled so that the upper friction wheel has the form of a downwardly tapering cone and the lower friction wheel the form of an upwardly tapering cone. These two friction wheels are arranged upon an upright hub or sleeve 17 which is preferably formed in one piece with these friction wheels and which is mounted on the adjacent-part of the tool shaft and connected therewith bymeans of a spline 18, 'sothat the frictionwheels and the hub and the tool shaft uponwhich these parts are mounted are compelled to turn together but arecapable of sliding axially relatively to one another. bearing 19 on the upper part of the column Below the lower friction wheel isa in which the adjacent part of a tool shaft is journaled'and above the upper friction wheel is another bearing 20 on the column in'which an upper extension 21 of the friction wheel hub is j ournaled. j j

22 represents a friction driving pinion,

preferably of conical formfwhich is ary ranged between the rear parts" of the upper and lower drivenfriction wheels. This frlction pinion is mounted on the front end. of

a driving shaft 28 which is j ournaled :horizontally and lengthwise in bearings on the upper part of the main frame, motion from any suitable prime mover being transmitted to the driving shaft preferably means. of a belt passing around a cone pulley '24 on the rear part' 'of the driving shaft; Upon raising both friction wheels so "that the lower one'xengages the underside of the driving pinion and theupper one isdisen 'gaged therefrom the tool shaft is turned forwardavitlr the tool mounted thereon for operatively engaging the work piece. Upon lowering the friction wheels so that the Means are provided whereby both friction wheels'are yieldingly held in an elevated position so that in a normal position 1 of the parts the tool and tool shaft will always turn forwardly. Various means may be provided v the friction wheels toturn independently of for accomplishing this purpose but those shown in the drawingsaresuitable and comprise ahorizontal shifting lever arranged lengthwise abovethe upper part of the main frame and pivotedbetween its front and rear arms on the adj acent part of the main frame by a transverse bolt 26, so that this lever swings vertically, The front arm of this-lever is operatively connected with the g V neararm thereof is arranged below the tension spring and the front arm thereof is. arranged above the work table and 95 upper extension of the hub ,of the friction wheels, so that these parts are compelledto move vertically together while permitting the shifting lever. This connection prefer: ably comprises upper and lower bearing coljlarsv 27, 28 secured one above the other on the hub extension 21, and anintermediate bearing ring 29 arranged between the upper and lower bearing collars and engaging therewith by means of interposedbeai-ing 'fballs 30 and pivotally connected with the forked front part of the shifting lever. A

ball thrust bearing is thus formed between thefshifting lever and the hub of the friction wheels which causes the latter to rise and fall upon rocking the shifting leverbut still perinitting these wheels to turn freely independently of this lever;

represents a spring having; its upper end connected withthe rear arm of the shifting'lever so asto eXert'a constantly down- Ward pull on the same and an upwardpull on the friction wheels for holding the lower friction' wheelr yieldingly in engagement with the underside of the driving friction pinion. The tension of this spring is so adjusted that the tool will be turned forwardly under normal conditionswith si flicient 7 power to operate upon the work piecefas required butl if" the tool should'become stuck or-reach the end of its work, as in the case i of. a screw cutting tap, at which time the tool encounters an abnormal resistance, the ;forward" rotation of-the tool 7111' be arrested andthedriving friction pinion will merely 9n the, lower friction wheel, thereby preventing breakage of any parts. hen: do-

'ing comparatively light work; the tension of I this spring is adjusted so that slippage of V the driving pinion on the lower driven friction wheel'will occur if only a moderate additional resistance is offered beyond that which is present duringthe normal opera tion of the tool on the work piecetbut if comparatively heavy drilling, tappingor similar workisbeing done the tension upon this spring may be increased so that it will require a much greater resistance to the for- .wardmovement of the tool before slippage of the driving friction pinion on the lower friction pinion occurs. Various means may be, proyidedfor adjusting the tension ofthisgo spring butthose shown in the drawings are preferably so designed that the workman can vary the tension of this spring quickly andaccurately while the machine is running -,and while the operator is standingin front 35 tically swinging adjusting lever32 pivoted -on the upper part of the main frame by nieans of a pin 33 or otherwise, so that the adjacent parts 'The rear-arm of the ad vjustinglever is adjustably connected with the lower end -of the, tension spring by v means of a tension rod 34 sliding vertically through a guide on the upper part of the main frame and connected at its upper end with the lower end; of the, tension spring while its lower end is provided with a screw nut 36 bearing against the, underside of the rear adjusting lever. The front arm of the adjusting lever; is provided with a laterally projecting locking pin 37: which is uradapted to engage with one of a plurality of locking openings 38 arranged in a row on the adjacent part of themain frame concentric with the pivot of this lever. By deflecting the] front arm of the adjustinglever laterally outward sufficient to disengage this locking pin from the respective locking recess with which it is in engagement and then raising Y or loweringthis-ai m and reengaging" its locking pin with oneor another of. the" re-' .maining locking openings, it is possible to vary the tension of this 'spring while the machine is running, so that the required pressure maybe applied by the lower driven friction wheel against the driving friction pinion 'for icontrolling the driving connection' between these partsand the-time when slippage between the same occurs in accordance with .thecharacter of the work which i is being operated'upon In additionto varying the tension of this spring byturningthe adjusting lever,.a further adjustment. of this spring independently .of this lever may be I effected by tightening orlooseningthescrew nut SG-arranged on the, tension rod and. engaging with thelrearrarm :ofthe adjusting spring to a sufficient extent so thatthe lower friction wheel isdisengaged from the friction pinion and the :upper frlction wheel is engaged therewithI-The means forelfecting this reversal in the movement of the tool ing l0 onthe upper part of the mainframe below the driving shaft and provided at its opposite ends with two 'i cranks or pins ll mounted eocentrically relativelyto the axis 1 loss on this account. therefore increasing the output of the machine.

of thisshaft, said cranksor eccentric pins belng arranged 111 line with each other.

i 42, -42 representtwo links arranged -1Ilfln uprigl ittposition on opposite sides =of the driving shaft and pivotally connected at their upper endswith the rear armsofthe I shiftingleven'bymeans of ahorizontal transverse bolt 43 and each link being connected with one of the cranks of'the crank shaft bv providing the lower end i of each link with a forked which rests on the upper side of one of thesecrankpms, as shown in Flgs.

2, 3 and l. The lower ends of these links are confined on the crank pinsby retaining disks 4:5 arrangedon the outerends ofthe crank pins and engaging withthe outer sides of the links. In the raisedposition of the friction wheels thecrankapinsof the rock shaft are arranged slightly below a horizontal. line drawn through the aXis of this shaft but upon turning this shaft so that its crank pins move upwardly, the rear arm of the shiftingdeyer willlbe raised and the front arm thereof lowered,-thereby engaging the upper friction wheel with the top of the friction pinion and disengaging the lower friction wheel therefrom for causing a reversal inlthe movement of a the tool shaft when it is desired to back up the stool. Ex tending forwardly from one of the retaining disks, preferably the right-hand one, is a hand lever l6 which may be grasped by the hand of the operator for effecting backward rotation of thetool shaft when desired. This may also be accomplished by foot pressure,

in order to leave the hands free to attend to' comprising a main frame, an upright .operthe workon the table orfor other purposes. This is accomplished by mounting a vertipinion I wheels, yielding pressing means for holding of an upright'shipper rod 48 with the hand lever -16. It is therefore possibleto reverse the rotation of the tool shafteither by pull ing downthe handleih withone hand of {the operator or pressing the 'treadle, e7 by.

means of a foot. When the hand and foot of the operator are both removed from the .hand lever and treadle, the same are raised and yieldingly held in an elevatedposition by means of. a sprlng 49 connecting the treagdlewith the adjacent part ofthe column, so that the-eccentric or crank shaftis turned in the direction for lowering the rear arm of .the shifting lever and causing the tool shaft to be turned forward by engagement of the lower friction wheel with the driving friction pinion.

By theuse ofthismachine, tapping, drilling and similar work may be effected very quickly and economically and as danger of,

' breakage is practically eliminated by reason of the friction driving gear betweenthe source of power and the working toolbreakage of any part of the machine or spoiling of the work is eliminated so that there is no As a whole,-the machine is very simplein construction, it has no delicateparts which ating shaft, two driven friction wheels mounted. one above the other on said shaft so as to turn therewith, a driving friction arranged between said friction the lower one of said friction wheels in en-v gagement with the underside of said friction piniomand means for manually lowering the upperone of said friction wheels into engagement with the upper side of said fric-, tion pinion. r a 2. A machine of the character described,

comprising a main frame, a verticaloperatingushaft, two driven friction wheels mounted one above the other on said shaft so as to turntherewith, a driving friction pinion arranged between said. frictlon wheels, yielding pressing means for holding the lower one of said friction wheels in engagement withthe underside of said frio-:

tion pinion, means for manually lowering the upper onelof said friction wheels into engagement withthe upper si'deof said fric-- tion pinion, andmeans for adjustingthe tension of said pressing means.

3. A machine of the character described,

to, :upper andlower driven friction wheels having a hub which is splined on. said shaft, a spring device operating to holdsaid driven friction wheels yieldingly in an'elevated positionin which the lower friction wheel engages said-pinion while the upper friction wheel is disengaged therefrom, and

manually operated means for loweringsaid J friction wheels so that the upper .friction comprising a main frame, an upright operatwheel engages the pinion and the lower friction wheel is disengaged therefrom.

A. A machine of the character described,

' ing shaft-journaled on saidframe and-capable of verticalmoveinent relatively thereto, upper andlower drivennfriction wheels having ahub which is splined on said shaft, a springdevice operating to hold said driven friction wheels yieldingly in an elevated position in which the lower friction wheel en'- gages said-pinion while the upper friction wheel is disengaged therefrom, said spring device, comprising a lever pivoted on said pivoted between'itsfront and rear arms on x frame to swing vertically and operatively connected with said hub and a springconiiecting with said lever, and manually operated means for lowering said friction Wheels so that the upper friction wheel engages the pinion and the lower friction wheels is di.s engaged therefrom.

5. A machine of atiiig shaft journaled on said frame and capable of vertical movement relatively thereto, upper and lower driven friction wheels having a hub which is splined on said shaft, a spring, device operating to hold said driven friction whe'els'yieldingly in an elevated position in which the lower fric tion wheel engages said pinion while the upper. friction wheel llS disengaged therefrom, said spring device comprising a lever said frame to swing vertically and having its front arm operatively connected with said hub, and a spring connected with said rear arm,.and manually operated means for lowering said friction wheels so that the up per friction wheel engages the pinionand ghelowerfriction wheel is disengagedthere:

rom,

y 6. A machine of thecharacter described,

comprising a main frame, an upright operating shaft ournaled on'saidframe and capable of vertical movement relatively thereto, upper and lower driven friction wheels having a hub which is splined on said shaft, a

spring device operating to hold said driven friction wheels yieldingly in an elevated position; in which the lower friction wheel engages said pinion while the upper friction wheel is disengaged therefrom, said spring device comprisinga lever pivoted on said frame to swing vertically, upper and lower bearing collars secured to said hub,

an intermediate; bearing ring arranged bev the character described, comprising a main frame, an'upright opertween said bearing collars and connected with said lever, a spring connected with said lever, and manually operatedimeans for lowering said friction wheels so that the upper,

friction wheel engages the pinion and the lower friction wheel is disengaged therefrom. i I

7. i A machine "of the character described,

comprising amain frame, an uprightopcratingshaft ournaled on said frame and ca-p pable of vertical movement relativelythereto,'upperandlower driven friction wheels having a hub whichis splined on said shaft, raspring device operating to hold said driven friction wheels yieldingly in an elevated po-' ,sition in -which the lower friction: wheel engages said pinion while the upper friction wheel is disengaged therefrom, said. spring vdevice comprising a shifting lever pivoted between its front and rear arms on said frame to swing vertically and having its front arm operatively connected with said hub, a spring connected with said rear arm,

holding vsaid adjusting lever in different positions, and manually operated means for friction wheels yieldingly in an elevated position inwhich the lower friction wheel en- ,-11)5 gages said: pinion while the upper friction an adjustingvlever pivoted 'on said frame andvconnected Wlth SillCl spring, means for wheel is disengaged therefrom, said spring w devicercomprising a shifting leverpivoted between-its front and rear arms onv said *frameto swing ,verticallyand having its front arm operatively connected with said hub, a springconnected with saidv rear arm, an ad usting lever pivoted on said frame and connected with said spring, and means 7 for holding SiLlCl arhusting lever in difierent positions comprising, a lockingpin arranged on the adjustinglever and adapted to en gage with one or another of a row of'openings in said frame,'and manually operated meansfor loweringsaid friction wheels so that the upper friction wheel engages the pinion andthe lower frictionwheel is disengaged therefrom. a

9. A machine of the character described, compi'isinga mainframe, an upright operatingshaftjournaled on said frame and capable of verticalmovement relatively thereto, upperand-lower driven friction wheels having a hub'which is splined on said shaft,

' a Sl1lftl11g1l6V61f pivoted on the main frame and operatively connectedwithsaid hub, a spring connected with the shifting lever andoperating to turn the'samein the direction for raising said friction wheels, and means for turning said shifting lever in a direction for lowering said, friction wheels, comprising a horizontal shaft journaled on the main frame and provided with a crank, a-link extending from said crank to said shifting lever, and manual means for turn ing said crank shaft.

10. A machine of the character described, comprising a main frame, anvupright operating shaft journaled on said frame and capable of vertical movement relatively thereto, upper and lower driven friction wheels having a hub which is splined on said shaft, a shifting lever pivoted on the main frame and operatively connected with said hub, a

P spring connected with the shifting lever and operating to turn the same in the direction for raising said friction wheels, andmeans for turning said shifting lever in a direction for lowering said friction wheels, comprising a horizontal shaft j ournaled on the main frame and provided with a crank, alink extending from said crank to said shifting f lever, and manual means for turning said f crank shaft, comprising a'handle connected with said crank shaft and a treadle connected with said handle.

11. A machine of the character described,

P comprising a main frame, an upright oper' ating shaft journaled on said frame and 021- pable of vertical movement relatively thereto, upper and lower driven friction wheels the main frame and provided with a crank at its opposite ends, links extending from said cranks ,to'said shifting lever, and manualrmeans for turning said crank shaft;

Witness my hand this 22nd day of July,

JOSEPH M. HOUSEL.

Witnesses:

H. M. WIGK, E. J. JoNns.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

